[PATCH 2/2] docs: hwmon: Document max127 driver

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From: Tao Ren <rentao.bupt@xxxxxxxxx>

Add documentation for max127 hardware monitoring driver.

Signed-off-by: Tao Ren <rentao.bupt@xxxxxxxxx>
---
 Documentation/hwmon/index.rst  |  1 +
 Documentation/hwmon/max127.rst | 43 ++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 Documentation/hwmon/max127.rst

diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index 408760d13813..0a07b6000c20 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -111,6 +111,7 @@ Hardware Monitoring Kernel Drivers
    ltc4245
    ltc4260
    ltc4261
+   max127
    max16064
    max16065
    max1619
diff --git a/Documentation/hwmon/max127.rst b/Documentation/hwmon/max127.rst
new file mode 100644
index 000000000000..e50225a61c1a
--- /dev/null
+++ b/Documentation/hwmon/max127.rst
@@ -0,0 +1,43 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver max127
+====================
+
+Author:
+
+  * Tao Ren <rentao.bupt@xxxxxxxxx>
+
+Supported chips:
+
+  * Maxim MAX127
+
+    Prefix: 'max127'
+
+    Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX127-MAX128.pdf
+
+Description
+-----------
+
+The MAX127 is a multirange, 12-bit data acquisition system (DAS) providing
+8 analog input channels that are independently software programmable for
+a variety of ranges. The available ranges are {0,5V}, {0,10V}, {-5,5V}
+and {-10,10V}.
+
+The MAX127 features a 2-wire, I2C-compatible serial interface that allows
+communication among multiple devices using SDA and SCL lines.
+
+Sysfs interface
+---------------
+
+  ============== ==============================================================
+  in[0-7]_input  The conversion value for the corresponding channel.
+		 RO
+
+  in[0-7]_min    The lower limit (in Volt) for the corresponding channel.
+		 For the MAX127, it will be adjusted to -10, -5, or 0.
+		 RW
+
+  in[0-7]_max    The higher limit (in Volt) for the corresponding channel.
+		 For the MAX127, it will be adjusted to 0, 5, or 10.
+		 RW
+  ============== ==============================================================
-- 
2.17.1




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